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bytedance/seedance-2.0/image-to-video

ByteDance's Seedance 2.0 image-to-video starts the clip on a still you supply and animates it, with sound in the same pass. Clips run 4 to 15 seconds at 480p, 720p, 1080p or 4K, and an optional closing still makes the shot arrive on a set frame.

From $0.07/s
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Quickstart

Examples use the selected endpoint’s public parameter definitions. Replace the API key and example media, then send the request from your server.

SDKs & integrations
POSThttps://api.spicyapi.ai/api/v1/jobs/createTask

API authentication

Keep the API key in the server environment variable SPICY_API_KEY. Use Bearer authentication and Content-Type: application/json for JSON requests.

Authorization: Bearer $SPICY_API_KEY
Sample outputUse this example
# Generate the idempotency key once; reuse it when retrying after a lost response.
export SPICY_IDEMPOTENCY_KEY="${SPICY_IDEMPOTENCY_KEY:-$(uuidgen)}"
curl -X POST https://api.spicyapi.ai/api/v1/jobs/createTask \
  -H "Authorization: Bearer $SPICY_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $SPICY_IDEMPOTENCY_KEY" \
  -d '{
  "model": "bytedance/seedance-2.0/image-to-video",
  "input": {
    "aspect_ratio": "adaptive",
    "bitrate_mode": "standard",
    "duration_seconds": 5,
    "generate_audio": true,
    "image_url": "https://example.com/reference.png",
    "prompt": "A slow aerial shot drifting over a misty pine forest at sunrise"
  }
}'

# Copy data.taskId from the response into TASK_ID, then poll the status.
TASK_ID="TASK_ID_FROM_RESPONSE"
curl "https://api.spicyapi.ai/api/v1/jobs/recordInfo?taskId=$TASK_ID" \
  -H "Authorization: Bearer $SPICY_API_KEY"

Generated from this model’s input schema — the same one the API validates every request against.

Input parameters

Place these fields inside the request body’s input object. Names and types match the API. Do not assume a default when none is specified.

image_urlstringRequired

Public, directly downloadable link to the first frame; required. It fixes composition, how the subject looks, the grade, and the quality ceiling — raising `resolution` will not sharpen a soft source. Text, watermarks, and logos carry into the video, so clean them off where possible. In a chained sequence this is usually the closing still returned by the previous segment. Seedance's own input check may turn away a photo that shows a real, identifiable person's face. Each side must be between 300 and 6000 pixels; a smaller plate is rejected by the input check before you are charged.

Default
Not specified
Constraints
contentMediaType:["image/jpeg","image/png","image/webp","image/gif"]
watermarkbooleanOptional

Adds the model’s own visible "AI generated" watermark to the video. Off by default; switch it on when the place you publish requires AI-made footage to be labelled. No effect on price.

Default
false
bitrate_modestringOptional

Encoding bitrate of the delivered file: `standard` (default) or `high`. High keeps fine texture and fast motion crisper at the same resolution and makes the file much larger; resolution, frame rate and length stay the same. No effect on price.

Default
"standard"
Allowed values
"standard""high"
return_last_framebooleanOptional

Also returns the clip’s final frame as a separate image next to the video. Send it to image-to-video as the next opening frame to chain shots without exporting a still yourself. Off by default; no effect on price.

Default
false
seedintegerOptional

Integer seed; omit it and each run draws its own. Fix it with everything else held constant to judge what a prompt edit actually changed. It is a comparison tool, not a promise of frame-identical repeats.

Default
Not specified
Constraints
minimum:0
maximum:2147483647
generate_audiobooleanOptional

Whether a native soundtrack is rendered in sync with the picture. On by default; switch it off for silent loops or when sound is added in post.

Default
true
duration_secondsintegerOptionalAffects price

Length in whole seconds, 4 to 15, defaulting to 5, and the billed quantity. Pass -1 and the model picks the length itself: the estimate assumes the 15-second maximum and the final charge follows the delivered length. A shot driven by one frame drifts further the longer it runs, so confirm the motion at 4 or 5 seconds, and build longer pieces from several takes cut together.

Default
5
Allowed values
-1456789101112131415
resolutionstringOptionalAffects price

Output resolution, 720p by default and reaching 4k; no upscaled tier is offered here. It sets a rate tier, and higher tiers mean bigger files and longer renders. It governs the delivered format only and adds no detail the source frame does not have.

Default
"720p"
Allowed values
"480p""720p""1080p""4k"
aspect_ratiostringOptional

Output framing, `adaptive` by default: the clip follows the ratio of the image you supplied, which removes the pre-crop step and keeps the subject away from the edges. Choose a fixed ratio only when the placement format is already set; the still is then centre-cropped to it. No effect on billing.

Default
"adaptive"
Allowed values
"21:9""16:9""4:3""1:1""3:4""9:16""adaptive"
last_image_urlstringOptional

Optional closing frame, only valid together with `image_url`. It decides the picture the shot lands on: transitions, before-and-after pairs, or a seamless loop that opens and closes on the same still. Keep the camera and light steady between the two and change a single clear state, or the middle turns into a cut. Each side must be between 300 and 6000 pixels; a smaller plate is rejected by the input check before you are charged.

Default
Not specified
Constraints
contentMediaType:["image/jpeg","image/png","image/webp","image/gif"]
promptstringOptional

Optional, but worth writing: say what happens after the frame rather than restate what is already visible — the action, the camera move, the passage of time, the sound. Left out, the model decides the motion on its own. Because the still already fixes the picture, this is the path that survives uncensored briefs — content that is in the frame does not have to be argued for in words.

Default
Not specified

Track the task

HTTP 202 means the task was accepted, not completed. Save the returned taskId and query that task. Do not create another task while waiting for its result.

Accepted response
HTTP/1.1 202 Accepted
Location: /api/v1/jobs/recordInfo?taskId=job_01k3m8x9q2z4v7n5p6r8s0t1w3

{
  "code": 200,
  "msg": "success",
  "request_id": "req_example_create",
  "data": {
    "taskId": "job_01k3m8x9q2z4v7n5p6r8s0t1w3",
    "state": "queued",
    "estimatedCost": "0.750000"
  }
}

The accepted response includes the estimate so your app can show the same amount in task history and billing.

Read the job
curl --get "https://api.spicyapi.ai/api/v1/jobs/recordInfo" \
  --data-urlencode "taskId=$TASK_ID" \
  -H "Authorization: Bearer $SPICY_API_KEY"

Start polling at about 2 seconds and gradually increase the interval. Stop at a terminal state. After a connection failure, query the original taskId. Retry creation only with the original idempotency key and body.

Or let the callback find you
import { verifyWebhook } from "@spicyapi/sdk";

// express.raw keeps the bytes we signed; express.json never matches.
app.post("/hooks/spicy", express.raw({ type: "application/json" }), (req, res) => {
  const { payload } = verifyWebhook({
    rawBody: req.body,
    timestamp: req.header("X-Webhook-Timestamp"),
    signature: req.header("X-Webhook-Signature"),
    payloadVersion: Number(req.header("X-Webhook-Payload-Version")),
    secret: process.env.SPICY_WEBHOOK_SECRET,
  });
  res.status(200).end();
  void handleFinishedTask(payload);
});

Pass callBackUrl when you create the task and the finished record is POSTed to you — no polling loop at all. Every delivery carries X-Webhook-Timestamp, X-Webhook-Signature and X-Webhook-Payload-Version. The signature is a base64 HMAC-SHA256 over taskId.timestamp.sha256(body), so it must be checked against the raw bytes: parsing the JSON and re-serialising it changes them and the check will fail. Failed deliveries are retried, so the same taskId can arrive twice — make the handler idempotent. Answer 2xx first and do the work afterwards; a slow handler is treated as a failed delivery.

Read the result

Consume output only when state is succeeded. On failure, use errorCode, errorMessage and request_id to investigate. Example costs and states do not represent an actual bill.

Completed response example
{
  "code": 200,
  "msg": "success",
  "request_id": "req_example_record",
  "data": {
    "taskId": "job_01k3m8x9q2z4v7n5p6r8s0t1w3",
    "model": "bytedance/seedance-2.0/image-to-video",
    "state": "succeeded",
    "output": {
      "assets": [
        {
          "key": "tasks/2026/08/28/job_01k3m8x9q2z4v7n5p6r8s0t1w3/3f7a1c9e5b2d48f0a6c1e3d5b7f9a1c3.mp4",
          "mime": "video/mp4",
          "url": "https://example.r2.cloudflarestorage.com/results/job_01k3m8x9q2z4v7n5p6r8s0t1w3/result.mp4?X-Amz-Signature=SIGNATURE_FROM_RESPONSE",
          "expiresAt": "2026-08-28T12:20:08.000Z"
        }
      ]
    },
    "cost": "0.750000",
    "settled": true,
    "createdAt": "2026-08-28T12:00:00Z",
    "completedAt": "2026-08-28T12:00:30Z"
  }
}

For each available asset, open or download assets[].url directly without an API Authorization header. The signed URL expires at expiresAt; poll the task again to refresh it while the asset remains within its retention period. A pending or unavailable asset has no URL. Treat signed URLs as private.

SDKs & integrations

Use SpicyAPI in your app, terminal, AI assistant or visual workflow. Choose a setup guide below.

SDKs
TypeScript · Python · Go · PHP · Java
CLI
Terminal commands and automation scripts.
MCP
Claude Code · Cursor · Codex
Agent Skill
Reusable instructions for your AI assistant.
n8n
Self-hosted community nodes and importable HTTP Request templates for n8n Cloud.
ComfyUI
Image, video and audio workflows on a node canvas.

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Browse ready-to-use workflows

Use it in ComfyUI

Install the SpicyAPI nodes from ComfyUI Manager or with the command below, then search for Seedance 2.0 · Image to Video on the canvas. The node has the same options as this page and shows its price before it runs.

cd ComfyUI/custom_nodes
git clone https://github.com/spicyapi-ai/comfyui-spicyapi
Workflow examplesSetup guideSource on GitHub